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ON NOW : Gemma Cairney
Playing: Bros by Wolf Alice

Gemma Cairney Adele Roberts sits in for Gemma with the best of Radio 1's Big Weekend so far!

Greg James

Image for Katy Perry - Greg’s reaction!

Katy Perry - Greg’s reaction!

Duration: 06:34

Enter Katy Perry! Producer Neil went the extra mile in arranging Greg James’ mystery guest today. Check out the look on Greg’s face when music megastar enters the room for an impromptu chat. Priceless!

Available since: Thu 24 Jun 2010

This clip is from

Greg James Thursday - Katy Perry is Greg's mystery guest!

David Garrido takes a look at the sport, plus Greg brings you a Ten Minute Takeover.

First broadcast: 24 Jun 2010

Image for Thursday - Katy Perry is Greg's mystery guest! Not currently available

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